Abstract: A determination method of sulfite in Zizania latifolia was established based on ion chromatography. The ion chromatographic conditions and pretreatments of sample were optimized. Then， the determination effect of this method was compared with distillation method， which is the national standard. The results indicated that this method has a good linearity in the range of 0.1-10.0 mg·L-1 for sulfur dioxide determination. The recovery rate was 86.1%91.7%， the precision of the proposed method was 2.9%4.2%， and the determination limit was 1.0 mg·kg-1.

Key words: ion chromatography, sulfur dioxide, Zizania latifolia, detection method